Printer&#39;s quoin.



J. T. BARTON.

PRINTEB'S QUOIN.

APPLIOATIONTILBI) APlL'l, 1013.

1,073,838, Patented Sept. 23, 1913.

COLUM-ll PLANDORAPM C8,, WASHINGTON, D. C-

JOSEPH T. BARTON, OF CHICAGO, ILLINOIS.

PBINTERS QUOIN.

Specification of Letters Patent.

Patented Sept. 23,1 91 3.

Application filed April 7, 1913. Serial No. 759,364.

To all whom it may 0012067 Be it known that I, J osnrn T. BARTON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Printers Quoins, of which the following is a specification.

This invention relates to the art of printing, and has reference more particularly to an improvement in that class of printing devices commonly known as quoins and employed to tighten and lock a printing frame in the chase.

The usual quoin comprises a pair of wedge-shaped blocks inversely disposed with their oblique faces in contact, with a key for drawing them together, and a fine ratchet on one block cooperating with a tooth on the other, whereby the two blocks are designed to automatically lock themselves against back movement under transverse compres sive strain. It is a well known fact to printers that, in a short time, the ratchet and tooth of a quoin become so dull as to be ineffective for this purpose.

One object of my invention is to provide a new and improved positive locking device by which the two parts of the quoin can be drawn together and positively locked in any set position.

Where a quoin is too narrow to alone fill. the space between the form and the side-bar of the chase, it is quite common practice to inter-pose a reglet between the quoin and chase, such reglets in practice consisting of bars or strips of wood that swell and shrink more or less under changes in atmospheric conditions, and soon become worn or broken. Furthermore, it frequently happens that, in passing through the press, the quoin will rock or tilt more or less between the adjacent side of the form and the reglct or creep lengthwise of the latter.

Another object of my invention, therefore, is to provide cooperating structural features on the quoin and reglet whereby these relative movements therebetween will be rendered impossible, and the two will always remain in fixed relative positions.

WVith the above objects in view, my invention consists in the novel matters herein after described and more particularly pointed out in the claims.

Referring to the drawing, wherein I have shown practical and approved forms of my invention, Figure 1 is a top plan view of a fragment of a chase, printing form, and interposed quoin and reglet embodying my invention. Fig. 2 is a cross-sectional detail on the line 2--2 of Fig. 1. Fig. 3 is a similar crosssectional detail illustrating an alternative tongue and groove arrangement between the quoin and reglct. Figs. t and 5 are perspective details of one section of a quoin and reglct, respectively, provided with another form of cooperating tongucs and grooves to prevent relative dis1.)lacement.

Referring first to Figs. 1 and 2 of the drawing, 10 designates a corner fragment of a chase, 11 a corner fragment of a printing form, and 12 and 13 the two cooperating sections of a quoin. in form or shape the quoin sections correspond to those now in coninnon use, and each may be provided with the usual racks let for engagement by a key in tightening the quoin, in a well known manner.

In accordance with my invention the central rib 15 of each quoin is formed with a groove 16 that extends through somewhat more than hall the length of the rib. As the edge of each rib is oblique, while the groove is parallel with the straight side, it follows that the groove is of gradually decreasing depth from one end of the quoin section to a point slightly beyond the center, the shallow inner ends of the grooves of the two sections overlapping on an oblique oint as clearly indicated in Fig. 1.

lVhen the quoin sections are brought to gethcr, the two grooves 1.6 are in substantial alinemcnt, and through these grooves is in sci-ted a bolt 17. The head '18 oi the bolt engages the broad end of one oi. the quoin sections, and the opposite end of the bolt is threaded as shown at 1%) and receives a nut 20 that, when turned up, engages the broad end of the other quoin section in the manner clearly shown in Fig. 1.. The nut 20 may be of any a pprovcd 't'orin adapting it to be turned up when in place; preferably having in its periphery holes or sockets 21 for the insertion of a pin, by which, through a step-by-step turning movement, the nut may be readily tightened or loosened. It will be manifest that, by tightening the nut 20, the quoin is expanded to a tight fit between the form and the chase, and the parts thereof are securely held in fixed relative positions until released. My invention, of course, dispenses with any necessity for the ordinary tightening means consisting of the I racks 14: and the usual cooperating key; but

these may be retained, if desired, to effect the tightening action, the bolt being employed simply to lock the quoin in expanded position.

Between the quoin and the side of the chase is the reglet 22. This member I preferably make of metal, and on that side thereof which engages the outer side of the quoin is formed a groove 23 in which fits a tongue 24 on the straight side of the quoin block 13,'as clearly shown in Fig. 2. This specific tongue and groove arrangement may, obviously, be reversed, as shown in Fig. 3, wherein a tongue 24 on the inner face of the re 'let en a es a roove 23 in the side of the quoin block.

Figs. 4 and 5 illustrate another modification of cooperating devices on the quoin and reglet for preventing relative angular and lengthwise movements between the two; said devices consisting of oblique tongues or ribs 24 on one of said members (here shown as the quoin block) cooperating with similarly shaped oblique grooves 23 on the proximate face of the other member (the reglet). This obviously prevents relative angular movement between the quoin and reglet, and the pitch of the oblique tongues and grooves is such as effectively prevents relative lengthwise movement under any and all service conditions tending to create relative displacement between the quoin and reglet.

It will be manifest to those skilled in the art that the structures herein shown and described for effecting the stated purposes of the invention may be somewhat modified in detail without any departure from the principles of the invention or sacrificing any of the advantages secured thereby. Hence, I do not limit the invention to the exact structure shown, except as clearly indicated in specific claims.

each formed with a bolt-receiving space ex tending parallel to the straight side of the block, and a bolt engaging the bolt-receiving spaces of said blocks, the head of said bolt engaging the wide end of one block,

and the nut of the bolt engaging the wide end of the other block.

3. A printers quoin comprising a pair of wedge blocks inversely disposed with their oblique faces in contact with each other and each formed in its oblique face with a groove disposed parallel to the straight side of the block, and a bolt engaging the grooves of said blocks, the head of said bolt engaging the wide end of one block, and the nut of the bolt engaging the wide end of the other I block.

4. The combination with a printers quoin, and a reglet, of a tongue on the side of one of said members extending obliquely in a direction from its upper to its lower edge and a cooperating groove in the adjacent side of the other member engaged by said tongue whereby to prevent both relative angular and endwise movements of said members when locked in a chase.

JOSEPH BARTON.

i/Vitnesses:

SAMUEL N. POND, EDMUND G. INGERSOLL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

